Means for operating reciprocating conveyers or screens



Nov. 30, 1926.

R. S. JACOBSEN MEANS FOR OPERATING RECIPROCATING CONVEYERS OR SCREENS Filed Oct. 25, 1918 fill Patented Nov. 30, 1926.

UITED STATES PATENT OFFICE.

RICHARD S. JACOBSEN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO VIEBSTER MFG. 00., A CORPORATION.

MEANS FOR OPERATING RECIPRGGATING GONVEYERS OR SCREENS.

Application filed October 25, 1918.

This invention relates to a novel mochanism for driving conveyors or screens with a reciprocating motion wherein the forward and backward strokes of each revolution, respectively, progressively increase and diminish in speed for the greater part of their travel. This is, this progressive acceleration or retardation is applied to approximately two-thirds of the stroke, the last third being utilized in reversing and thereby reducing the shock which would occur in a sudden reversal.

The driving mechanism for imparting the desired motion to the conveying trough can be propelled by any source of power and is constructed and arranged for producing a progressively increasing and decreasing speed.

This particular motion is obtained and imparted to the conveying trough, through the employment of an eccentric disk, rotating about and guided byan eccentric sleeve, in such manner, that the distance from the center of said eccentric to the center of the drive shaft, is constantly and uniformly changing between the maximum and minimum.

To these and other purposes my invention consists in the novel construction, combination, provision and relative positionof parts and members set forth in the following specification and accompanying drawings, and more particularly brought out in the claims.

Referring to the drawings in which like reference characters indicate like or corresponding parts, Figure 1 is an elevation showing a pair of troughs and my improved mechanism for imparting the herein described motion to the conveying troughs. Figure is aplan view of Figure 1. Figure 3 is a section taken on line 3-.3

Figure 4, showing my improved driv- 9 means,

section taken on line 44 of gure p s Figure 5 illustrates diagrammatically the motion and speed diagraniof the troughs.

Referring to the drawing, I provide an eccentric sleeve bearing which may be securely supported upon the concrete pier 11 or any suitable wood or steel support, by means of bolts 12 and which bearing is arrangedto support the drive shaft 13 eecentrically with relationto the center line Serial No. 259,609.

14: of the sleeve bearing 10 whose extending sleeve ends 10 are of slightly decreased diameter to lit the bore of the oppositely disposed hubs 15 of the spaced eccentric disk walls 15 which are connected by the arcuate annular wall 15 to form an interior oil chamber lGwithin the eccentric 15.

The hub end of the forked crank 17 is rigidly connected or keyed to the drive shaft 13 by means of key 18 and the ends of the A two spaced arms N are connected with the disk walls 15 by means of link 19 and bolts or pins 20 and 21. The link 19 is made comparatively shorter than the crank arms 17 and the pin 21 extends into walls 15 The pin 20 only connects the arms 17 with link 19 and clears the inner face of walls 15 The outer eccentric strap member of eccentric 1:3v is composed of two sections 15 and 15 securely bolted together with the bolts 22. An extending web 15 and a pair of flanges 15 afford a rigid connection for the connecting rod 23.

The distance between the center of the outside diameter of the eccentric sleeve end lO 'and the center of the eccentric disk 1% B is designated as X and the horizontal and vertical distances between the center of the outside diameter of the eccentric sleeve end 10 'and the'center of the drive shaft 13 are designated by respective Y and Z. The revolution of the drive shaft 18 will cause the eccentric disk 15 to rotate about the center of drive shaft 13, through the keyed crank 17 and link19, with a progressively increasing and decreasing speed.

The moment of the upper trough acting on the drive shaft is to a certain extent counter-acted by the moment of the lower trough acting on the same shaft, and the resulting moment which is transmitted to the supporting structure through sleeves 10 is equal to the difference of said moments.

Figures 1 and 2 illustrate a fori'n of my invention as applied to stepped troughs arrangedfor horizontally conveying material in the same direction. Both upper and lower troughs are channel shaped and" comprise sides 24: and bottom 24?. The troughs, as herein shown, are mounted for horizontal reciproc atory movement upon supporting rollers 25. A cross rod 26 mounted in the bearings 27 which are suitably and rigidlyconnected with the trough,

cross-connects the outer ends of the rods 23.

ings; cranks mounted Within said disks and rigidly connected to said drive shaft; a link connecting each crank with an eccentric disk; and connecting means extending directly from. said disks for imparting a reciprocating motion substantially as described.

11. Means for operating reciprocating conveys-rs or screens comprising a drive shaft; a plurality of bearings supporting said shaft eccentrically to the adjacent ends of said bearings; crank arms rigidlymounted on said shaft between said bearings; eccentric disks mounted on the ends of said bearings; and means attached to and within said disks arranged for actuation by said arms for operating the disks.

12. Means for operating reciprocating conveyors or screens, comprising in combination, a pair of bearings; an eccentric mounted on said bearings centrally between them; a uniformly rotating shaft extending through said bearings and eccentrically to the axis of revolution of said eccentric; and driving means for said eccentric arranged for connection to said shaft between said bearings.

13. Means for operating reciprocating conveyers or screens, comprising in combination, an eccentric having a divided hub and spaced, peripherally-connected, disk walls forming a chamber there-between; a pair of bearings for said hub; a shaft extending between said bearings; and means operating within said chamber for operatively connecting said shaft and said eccentrio.

14. Means for operating reciprocating conveyors or screens, comprising in combination, an eccentric having a pair of oppositely disposed coaxial hubs and spaced, peripherally-connected, disk walls forming a chamber therebetween; a pair of bearings for said hub; a shaft extending between said bearings; and means operating within said chamber for operatively connecting said shaft and said eccentric.

15. Means for operating reciprocating conveyors or screens, comprising in combination, an eccentric having a pair of oppositely disposed coaxial hubs and spaced, peripherallyconnected, disk walls forming a chamber therebetween; a pair of bearings for said hub; a shaft extending between said bearings; means operating within said chamber for operatively connecting said shaft and said eccentric, said means including a crank rigid on said shaft, a link, and a pair of pins connecting said link with said crank and said eccentric, said pins being in double shear.

16. Means for operating reciprocating conveyers or screens, comprising in combination, an eccentric having a divided hub and spaced, peripherally-connected, disk walls forming a chamber therebetween; a bearing for said hub; a shaft extending through said bearing and into said chamber and means operating within said chamber for operatively connecting said shaft and said eccentric.

In witness whereof, I have hereunto subscribed my name this 22nd day of October, 1918.

RICHARD S. JACOBSEN. 

